Kellogg Garden Soil Calculator: How Much Soil Do You Need for Your Garden?
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Soil Calculator
Calculate how much soil you need for your garden beds, raised beds, or containers
Units
Feet × Feet × InchesMeters × Meters × Centimeters
Length (feet)
Width (feet)
Depth (inches)
Calculate
Results
Volume: cubic feet
Volume: cubic yards
1 cu ft bags needed:
1.5 cu ft bags needed:
2 cu ft bags needed:
What Is the Kellogg Garden Soil Calculator?
The Kellogg Garden Soil Calculator is a free online tool that helps gardeners, landscapers, and homeowners figure out exactly how much soil they need for any project. Hosted on the Kellogg Garden Products website at kellogggarden.com/soil-calculator/, this calculator takes the guesswork out of one of the most common questions in gardening: “How many bags of soil do I actually need?”
Kellogg Garden Products has been a leading manufacturer of organic soils, mulches, and fertilizers since 1925. Their soil calculator reflects decades of practical experience, offering dedicated modes for different project types including lawn topdressing, container gardening, and — most usefully — raised garden beds. You simply enter your project’s length, width, and desired soil depth, and the tool instantly calculates the volume in both cubic feet and cubic yards, along with estimated bag equivalents.
Overestimating soil means wasted money and leftover material cluttering your garage. Underestimating means an extra trip to the garden center mid-project. The Kellogg Garden Soil Calculator eliminates both problems with a fast, accurate, and easy-to-use interface that anyone can master in under a minute.
Key Features
- Multiple Project Modes: The calculator offers dedicated modes for “Garden Beds,” “Lawn,” and “Pots & Containers,” each with tailored input fields so you get the most relevant calculations for your specific project type without unnecessary clutter.
- Dimension-Based Calculation: Enter your project’s length, width, and desired soil depth in inches or feet, and the tool computes the exact volume needed — no complex geometry formulas required on your end.
- Volume in Multiple Units: Results are displayed in cubic feet, cubic yards, and estimated number of bags, making it easy to order bulk soil by the yard or pick up individual bags at your local retailer.
- Raised Bed Mode: A specialized “Garden Beds” calculator accounts for the rectangular dimensions of raised beds, making it simple to fill new beds or top off existing ones with the precise amount of soil mix.
- Free and Instant Results: No registration, downloads, or fees — just enter your dimensions and get immediate results directly in your browser on any device.
Pros and Cons
| Pros | Cons |
|---|---|
| Free with no account required | Limited to rectangular or square shapes |
| Multiple project modes for different uses | Results favor Kellogg product bag sizes |
| Provides bag count estimates for easy shopping | No option to save or print calculations |
| Mobile-friendly web interface | Does not calculate soil amendments or fertilizer needs |
| Backed by a trusted brand in organic gardening | No circular or irregular bed shape support |
Pricing
The Kellogg Garden Soil Calculator is completely free. There are no premium features, paid tiers, or trial limitations. It is a web-based tool available directly in your browser with no download or installation required. Kellogg Garden Products offers this calculator as a free resource to help customers plan their projects — and naturally, the bag count estimates are based on Kellogg’s own product sizes, though the cubic foot and cubic yard measurements are universal and apply to any soil brand.
How to Use the Kellogg Garden Soil Calculator
Follow these steps to calculate exactly how much soil your project requires:
- Access the calculator: Visit kellogggarden.com/soil-calculator/ in your web browser. The page loads quickly and works on desktops, tablets, and smartphones.
- Choose your project type: Select “Garden Beds,” “Lawn,” or “Pots & Containers” depending on your project. Each mode presents the most relevant input fields for that application.
- Enter your dimensions: Input the length, width, and desired soil depth for your garden bed, lawn area, or container. Use a tape measure for the most accurate results.
- Review the results: The calculator instantly displays your soil volume in cubic feet, cubic yards, and the approximate number of bags needed to complete your project.
- Round up and shop: Always round up to the nearest whole bag when purchasing. It is better to have a small amount left over than to come up short partway through your project.
Who Should Use This Tool?
This calculator is perfect for home gardeners building or refilling raised beds, which is one of the most popular and soil-intensive gardening projects. It is equally useful for homeowners topdressing or establishing new lawns who need to order bulk soil by the cubic yard. Container gardeners on balconies and patios will appreciate the pots mode for determining how many bags of potting mix to buy. Even professional landscapers can use it for quick estimates on small to mid-sized jobs before placing a bulk order with their supplier.
Recommended Products
Complete your raised bed or garden project with these top-rated essentials:
- Organic Raised Bed Soil Mix: A premium, pre-mixed organic soil blend formulated specifically for raised garden beds. Contains the ideal balance of organic matter, perlite, and nutrients to support vigorous vegetable and flower growth from day one.
- Outdoor Compost Bin: A durable, ventilated compost bin that turns kitchen scraps and yard waste into nutrient-rich compost. Making your own compost reduces the amount of store-bought soil you need for future garden bed top-offs and amendments.
- Dual-Wheel Wheelbarrow: A heavy-duty, dual-wheel wheelbarrow designed for stability when hauling heavy loads of soil, compost, or mulch. The two-wheel design prevents tipping, making it safer and easier to transport bulk soil from your driveway to your garden beds.
Frequently Asked Questions
How deep should the soil be in a raised garden bed?
Most vegetables need at least 6 to 12 inches of soil depth to develop healthy root systems. Deep-rooted crops like tomatoes, carrots, and potatoes benefit from 12 to 18 inches. If your raised bed is tall but you want to save on soil costs, you can fill the bottom portion with branches, leaves, or cardboard (a method called Hugelkultur) and add soil on top.
Should I use the cubic feet or cubic yards measurement?
Use cubic yards when ordering bulk soil from a landscape supply company or nursery, as they typically sell by the yard. Use cubic feet or the bag count when buying bagged soil from a garden center or home improvement store. One cubic yard equals 27 cubic feet.
Can I use this calculator for irregularly shaped garden beds?
The calculator is designed for rectangular or square beds. For irregular shapes, break the area into smaller rectangles, calculate each one separately, and add the results together. For circular beds, you can estimate by using the diameter as both length and width, then reducing the result by about 22 percent (since a circle is roughly 78 percent the area of its bounding square).